| 3 |
| 7 |
| 1 |
| 2 |
| 3 |
| 7 |
| 1 |
| 2 |
=
| 3 |
| 7 |
| 1 |
| 2 |
| 3 |
| 7 |
| 1 |
| 2 |
=（
| 3 |
| 7 |
| 3 |
| 7 |
| 1 |
| 2 |
| 1 |
| 2 |
=
| 6 |
| 7 |
=
| 6 |
| 7 |
②73÷0.8÷12.5，
=73÷（0.8×12.5），
=73÷10，
=7.3；
③
| 1 |
| 2 |
| 1 |
| 2 |
=（201-1）×
| 1 |
| 2 |
=200×
| 1 |
| 2 |
=100；
④(
| 1 |
| 3 |
| 1 |
| 8 |
| 1 |
| 24 |
| 1 |
| 24 |
=（
| 1 |
| 3 |
| 1 |
| 8 |
| 1 |
| 24 |
=
| 1 |
| 3 |
| 1 |
| 8 |
| 1 |
| 24 |
=8+3-1，
=10．
| 怎样算简便就怎样算． ①
| ②73÷0.8÷12.5 | ③
| ④(
|
| 3 |
| 7 |
| 1 |
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| 3 |
| 7 |
| 1 |
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| 7 |
| 1 |
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| 7 |
| 1 |
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| 7 |
| 3 |
| 7 |
| 1 |
| 2 |
| 1 |
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| 6 |
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| 6 |
| 7 |
| 1 |
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| 1 |
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| 1 |
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| 1 |
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| 1 |
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| 1 |
| 8 |
| 1 |
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| 1 |
| 24 |
| 1 |
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| 1 |
| 8 |
| 1 |
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| 1 |
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| 1 |
| 8 |
| 1 |
| 24 |